O or s aryl-n,n&#39;,n&#39;&#39; hexaalkyl phosphonium salts and their method of preparation

ABSTRACT

COMPOUNDS OF THE FORMULA   R1-N(-R2)-P(+)(-Y-R)(-N(-R3)-R4)-N(-R5)-R6 Z(-)   WHEREIN R1, R2, R3, R4, R5 AND R6 ARE INDIVIDUALLY ALKYL OF 1 TO 6 CARBON ATOMS OR CYCLOALKYL OF 3 TO 6 CARBON ATOMS WITH THE PROVISO THAT R1, R2, OR R3, R4, OR R5, R6 MAY BE JOINED TO FORM A LINEAR ALKYLENE RADICAL OF 4 TO 6 CARBON ATOMS WHICH IS BOUND TO THE NITROGEN TO FORM A RING, AND WITH THE FURTHER PROVISO THAT WHEN BOTH GROUPS ATTACHED TO ANY AMIDO NITROGEN ARE ALKYL, THEN AT LEAST ONE OF SAID ALKYL GROUPS MUST HAVE A PRIMARY ATTACHMENT, Y IS OXYGEN OR SULFUR, R IS AN ARYL GROUP OF 6 TO 10 CARBON ATOMS OPTIONALLY SUBSTITUTED WITH HALOGEN ATOMS, NITRO GROUPS, ALKYL GROUPS OR ALKOXY GROUPS AND Z REPRESENTS A HALOGEN-CONTAINING ANION. THE COMPOUNDS FIND USE AS PESTICIDES, PARTICULARLY HERBICIDES DEFOLIANTS AND FUNGICIDES.

United States Patent 3,755,510 0 OR S ARYL-N,N,N HEXAALKYL PHOSPH NIUM SALTS AND THEIR METHOD OF PREPARATION David Cheong King Chan, San Francisco, Calif., assignor to Chevron Research Company, San Francisco, Calif. No Drawing. Filed Dec. 21, 1970, Ser. No. 100,415 Int. Cl. A01n 9/36; C07f 9/54 19 Claims US. Cl. 260-959 ABSTRACT OF THE DISCLOSURE Compounds of the formula N(R3R4) (R R )N-P YR 2 N s fi) wherein R R R R R and R are individually alkyl of l to 6 carbon atoms or cycloalkyl of 3 to 6 carbon atoms with the proviso that R R or R R or R R may be joined to form a linear alkylene radical of 4 to 6- carbon atoms which is bound to the nitrogen to form a ring, and with the further proviso that when both groups attached to any amido nitrogen are alkyl, then at least one of said alkyl groups must have a primary attachment, Y is oxygen or sulfur, R is an aryl group of 6 to 10 carbon atoms optionally substituted with halogen atoms, nitro groups, alkyl groups or alkoxy groups and Z represents. a halogen-containing anion. The compounds find use as pesticides, particularly herbicides, defoliants and fung1-. eides.

BACKGROUND OF THE INVENTION Field The present invention is directed to hexaalkyltriamido aryloxyand arylthio-phosphonium halides. These phosphonium compounds find use as pesticides, particularly herbicides, defoliants and fungicides.

Prior art SUMMARY OF THE INVENTION A new class of compounds has now .beendiscovered, namely the hexaalkyltriamido aryloxyand arylthio-phosphonium' halides. The method of preparation of the subject compounds is also new. The compounds find use as herbicides, defoliants and fungicides.

"DESCRIPTION OF THE INVENTION ice 35 (fluorine, chlorine or bromine), alkyl groups individuthe con- Compounds of the present invention may be repree wherein R1, R2, R3, R4, R and R are individually alkyl of 1 to 6 carbon atoms, cycloalkyl of 3 to 6 carbon atoms with the proviso that R R or R R or R R may be:

joined to form a linear alkylene radical of '4 to 6 carbon atoms which is bound to the nitrogen to form a ring;

and with the further proviso that when both groups attached to any amido nitrogen are alkyl at least one of said alkyl groups must have a primary attachment; Y is oxygen or sulfur; R is aryl of to 10 carbon atoms substituted with 0 to 5 halogen atoms of atomic number 9 to' ally of l to 4 carbon atoms, alkoxy groups individually of 1 to 4 carbon atoms or nitro groups and Z is an anion containing a halogen atom of atomic number 17 to 53, preferably hydrogen dihalide anion such as hydrogen dichloride, hydrogen dibromide or hydrogen diiodide.

R R R R R and R may be the same or different.

Preferably they will be the same. Representative groupswhich R through R may represent include methyl, ethyl, n-propyl, n-butyl, i-butyl, n-pentyl, n-hexyl, cyclopentyl, cyclohexyl. Preferably R through R; will be alkyl groups of 1 to 4 carbon atoms. When used as fungicides it is particularly preferred that R through R be alkyl of 3 to 6 carbon atoms, preferably 3 to 4 carbon atoms.

When both groups attached to the amido nitrogen are alkyl groups (as opposed to cycloalkyl groups), at least one of the alkyl groups on said amido nitrogen must have primary attachment to the nitrogen. The other alkyl group may have primary, secondary or tertiary attachment. The terms primary, secondary and tertiary attachment refer to the structuure of the carbon attached directly to the nitrogen. Thus stated another way, when R R or R R or R R are both alkyl, then only one of R R or R R or R R may have secondary or tertiary attachment to the amido nitrogen. When one of the groups attached to an amido nitrogen is cycloalkyl, the other group may be alkyl or cycloalkyl and, if alkyl, the group may be primary, secondary or tertiary.

While R in the above formula may be phenyl or naphthyl or substituted phenyl or naphthyl, it is preferred that R be phenyl or substituted phenyl. Thus R is preferably phenyl or phenyl substituted with l to 5 halogen atoms of atomic number 9 to 35, alkyl groups of 1 to 4 carbon atoms, alkoxy groups of 1 to 4 carbon atoms or nitro groups. Preferably the total number of substituents on the phenyl group will not exceed 3. Thus representative R groups include 2 chlorophenyl, 3 chlorophenyl, 4- chlorophenyl, 2,4 dichlorophenyl, 3 methylphenyl, 4- methoxyphenyl, 2-chloro-4-nitrophenyl, 2,6-difiuorophenyl, 2,5-dichlorophenyl, 2-chloro-5-bromophenyl, 4-butoxyphenyl, 3-phenoxyphenyl, 4-nitrophenyl, etc.

Representative compounds for the present invention are hexamethyltriamido phenoxy phosphonium hydrogen dibromide, hexamethyltriamido 2-chlorophenoxy phosphonium chloride, hexaethyltriamido phenoxy phosphonium hydrogen dichloride, hexaethyltriamido 4-methoxyphenoxy phosphonium bromide, hexa-n-propyltriamido '2-chlorophenoxy phosphonium hydrogen diiodide, hexaalkyltriamido 4-nitrophenoxy phosphonium iodide, N-dimethyl- N diethyl-N" di-n-propyltriarnido'2-methylphenoxyhy drogen dibromide, N-methylethyl-N'-i-propyl-n-butyl-N"- n-pentyl-n-hexyltriamido 2-naphthyloxy phosphonium hydrogen dichloride, N-dimethyl-N'-diethyl-N"-methylcyclohexyltriamido 3-methoxyphenoxy phosphonium; hydrogen dibromide, N,N,N"-tripiperidido 3-tbutylphenoxy phosphonium hydrogen dibromide, N,N,N" tripyrrolidido pentachlorophenylthio phosphonium hydrogen dichloride, N diethyl-N'dicyclopentyl-N" dicyclohexyltriamido 2,4 dichloro-5-ethylphenylthio phosphonium hydrogen .dib ro? mide, hexahexyltriamido pheuylthio phosphonium hydrogen diiodide. V 7

The compounds of thisinvention are prepared by reacting a phenol or thiophenol with a'triamidohalophosphonium halide according to the'following equation:

, a; e p a; n e IhRzN-P-XX +H-Y-R R1RgNP-YR HXr NRsRu NRs Ra I wherein R, R R R R R R and Y all have the same meaning as before, and. X is halide. In the preferred method of operation the phenol or thiophenol dis Patented Aug. 28, 19.73

. 4 solved in a solvent is added to a molar equivalent of the ing this latter period in order to remove any unreacted triamido halophosphonium halide also dissolved in an' chlorine or bromine. The product of this reaction may inert solvent, preferably a low boiling chlorinated hydrobe isolated by evaporation of the solvent but is prefercarbon such as methylene chloride or chloroform. The ably used as is; that is, in the solvent used, Without any quantity of solvent varies from about 10 to 100 times further workup.

by weight of the phosphonium halide. A major portion The phosphorous triamides employed in the preparaof this amount of solvent is used to dissolve the phostion of the triamido halophosphorium halides are well phonium halide, whereas a minor portion is used to disknown and may be prepared by well known processes.

solve the phenol or thiophenol compound. The reaction Generally, the triarnide is obtained by the reaction of is carried out at temperatures in the range of from 0 C. phosphorus trichloride and an amine.

to the reflux temperature of the reaction mixture, about The subject invention will be more fully understood 40 C. Under these conditions the reaction is usually by reference to the following examples.

complete within 2 to 24 hours. The product is isolated by evaporation of the solvent. In many cases the product ghi g figfi igg g gigiii i is extremely delinquescent and must be isolated and kept 5 i a moisture-free environment A 500 ml. flask immersed in an ice-water bath was It is desirable that the reaction be carried out under charged With a (0:0 5 mole) of N,N',N-hexa-nanhydrous conditions. The presence of water decreases PIOPYl Phosphonc mamlde, 200 of dichlofomethane the yield of product and inhibits purification. A conand of Linda Type 5A Then a venient way in which to ensure water-free reaction consohmon of '54- (0-025 mole) of bromme m 50 of ditions is to carry out the reaction in the presence of dichloromethane was added slowly with stirring and while molecular sieves (Linde Size 5A). The reaction is prefmamtamlflg the temperature about Aftel all erahly carried out in an atmosphere of dry nitrogen the bromine was added, the mlxturewas allowed to Warm To Obtain the halide anion comprising compound, as to room temperature. Dur ng this tlme dry nitrogen was opposed to the hydrogen dihahde compound, the product bubbled through the solution. Then 2.4 g. (0.025 mole) f reaction (I) can be treated with an amine Uh of phenol dissolved 1n l0 ml. of dichloromethane was ethylamine, to tie up hydrogen halide, and the triethyh added rapidly. The resulting mixture was stirred at reflux amine hydrogen h d remove temperature for 8 hours. At the end of this time the solu- Th i i halophosphon-mm halide feed stock for tron was filtered, and the filtrate evaporated under vacuum the above-described reaction is prepared by the addition to glve O a vlscous Olly Product of 1 mole of molecular halogen, e.g., chlorine, bromine, Analysls' calculated for C24H4BBT2N3OP (Percent): or iodine, to 1 mole of a phosphorous triamide. This Found (Patient): 2725; reaction is also carried out in an inert solvent, prefer- An mfrared'spectra was conslsfem Wlth the asslgned ably the Same solvent as is used in the subsequent reac structure and had strong absorption peaks at 6.85, 7.25-

tion to produce the compounds of this invention. The 9' 13'25 and quantity of solvent ranges from that which is sufficient Example -2.--Hexa-n-propyltriamido 4-chlorophenylthio to dissolve the reactants up to 10 times that much. This phosphonium hydrogen dibromide halogenation reaction is generally carried out at temper- Bmminafion a a was carried out by essentially the same a e 5212.53 retr ats:..t;.sie.t.t.S-.:: a as 5 amide dissolved in the desired Solvent Th 0d 0f mole) of p-chlorothrophenol dissolved m 50 ml. of dihalo an add tio e e on e f g n e chloromethane was added rapldly, and the resulting mixiodirfe is dissolved in a portion of the solven t b efore mm was i 53 hoursa After filtering the z was eva ora e o ness un v u v 1 addition; bromine may be added neat, but preferably is f il Pmducg er ac um to g W the fii ii i.1323?.iiiiivii ii iini fifii hill?! s 'ii i." 1 il 5 t fi ii tii i '32" 0; aogen, meq. g. oun: 0' ,5. a; solvent. The reaction is quite rapid and is essentially halogen, 4.9 meq./g. An infrared spectra showed strong complete when all the halogen has been added. However, absorption at 6.8, 7.25, 8.3, 8.7, 9.15, 9.65, 12.2 and it is desirable to stir the reaction for /4 to 1 hour after 13.45 4.

addition is complete to ensure complete reaction. Nitro- Other compounds were prepared according to the above gen gas may be passed through the reaction mixture durprocedure and are listed in Table I.

' TABLE I Analysis Calculated Found Example Halo- H number Compound V N P S gen 1 N P S ggr i Hexa-n-propyltriamldo 2,4-diehlorophenoxy phosphonium hydrogen dibromide 13. 9 11. 9 Hexaethyl triamido 2,4-dichlotophenoxy phosphonium hydrogen dibromide 7 0 Hexa-n-butyltriamido phenoxy phosphonium hydrogen dibromide- 24 5 Hexaethyl triamldo phenoxy phosphonium hydrogen dibromide--- 31, 6 Hexamethyl triamldo phenoxy phosphonium hydrogen dibromide. 33 3 Hexa-n-butyltriamido 4-ehlorophenylthio phosphonium hydrogen bromi 4 2 Hexa-n-butyltziamido i-chlorophenoxy phosphonium hydrogen dibromide- 4 4. Hexa-n-propyltriamido d-chlorophenoxy phosphonium hydrogen dibromide 5, 2 11.--- Hexaethyltnanndo A-ehlorophenoxy phosphonium hydrogen dibromide 5 6 12- Hexamethyltriamido 4-chlorophenoxy phosphonium hydrogen dibromide..- 6 g 13. Hexa-n-propyltnamido phenylthio phosphom'um hydrogen dibromide--.... 7. 0 14 Hexaethyltriamido phenylthio phosphonium hydrogen dibromide 8. l 30. 9 31. 2 1 Hexan-butyltriamido 2-methoxyphenoxy phosphonium hydrogen dibromide-.. 6. 0 22. 8 22. 8 1 Hexa-n-propyltnacmido 2-methoxyphenoxy phosphonium hydrogen dibromide 6. 8 26. 0 25. 6 Hexaethyltriamido Z-methoxyphenoxy phosphonium hydrogen dibromide. 7. 9 30. 1 28. 2 18... Hexa-n-butyltnamido i-methoxyphenoxy phosphonium hydrogen dibromid 6. 0 22. 8 21. 9 exa-n-propyltnamido 4-methoxyphenoxy phosphomum hydrogen d1brormde 6. 8 26. 0 25. 7 20.-- Hexaethyltnarmdo 4-methoxyphenoxy phosphonium hydrogen dibronnde 7. 9 30. 1 30. 2 21--- Hexa-n-bntyltriamido B-phenoxyphenoxy phosphonium hydrogen dibromide-.- 5. 5 21. 0 20. 4 22. Hexa-n-propyltriamido 3-phenoxyphenoxy phosphonium hydrogen dibromide... 6. 2 23. 6 23. 2 23- Hexaethyltriamido 3-phenoxyphenoxy phosphonium hydrogen rlihrnmirin 7. 1 26. 9 25. 9 24- Hexa-n-butytflamido Z-t-butylphenoxy phosphonium hydrogen dibromide 5. 8 22. 0 21. 2 25 Hexa-n-propyltriamido Z-t-butylphenoxy phosphoninm hydrogen dibromide- 24. 9 22. 7 Hexa-n-butyltriaznido 3-t-butylphenoxy phosphonium hydrogen dibromide. 22. 0 22. 3 27 Hexa-n-butyltriamido pentachlorophenoxy phosphonium hydrogen dibromide 8. 3 8. 3

See footnotes at end of table.

TABLE I-Contlnued Analysis Calculated Found Halo- Halo- Compound N P S gen l N P S gen 1 Hexa-n-propyltiiamido pentachlorophenoxy phosphonium hydrogen dibromide 5. 6 9. 3 6. 6 8. 7 Hexaethyltn'amido pentachlorophenoxy phosphonium hydrogen dibromide 6. 10.4 5. 8 10. 4 Hexa-n-butyltriamido 2-s-butylphenoxy phosphonium hydrogen dibromide 5. 8 22. 1 5. 8 22. 6 Hexa-n-propyltriamido 2-s-butylphenoxy phosphonium hydrogen dibromide 6. 6 34. 9 6'. 6 25. 0 Hexa-n-butyltriamido 2,4 dimethylphenoxy phosphonium hydrogen dibromide 6. 1 22.9 6. 4 23. 6 Hexa-n-propyltriamido 2,4-dimethylphenoxy phosphonium hydrogen dibromide 6. 9 26. 1 6. 7' 26. 1 Hexaethyltriamido 2.4-dimethylphenoxy phosphonium hydrogen dibromide. 7. 9 30. 2 8.3 30.0 Hexa-n-butyltriamido 4-bromophenoxy phosphonium hydrogen dibromide... 5. 6 32. 0 5. 8 32. 2 Hexa-n-propyltriamido 4-bromophenoxy phosphonium hydrogen dibromide 6. 3 36. 1 6. 3 35. 2 Hexaethyltriamido 4-bromophenoxy phosphonium hydrogen dibromide 7. 2 41. 3 6. 5 40. O Hexa-n-butyltriamido imethylphenoxy phosphonium hydrogen dibromide 6. 2 23.4 6. 2 23. 5 Hexa-n-propyltriamido 4-methy1phenoxy phosphonium hydrogen dibromide- .7. 0 26. 7 6. 7 27.0 Hexaethyltriamido 4-methylphenoxy phosphonium hydrogen dibromide 8. 2 31. 0 8. 3 31. 6 Hexa-n-butyltriamido 2-methylphenylthio phosphonium hydrogen dibromide 6. 0 22. 8 6. 4 23. 6 Hexa-n-propyltriamido 2-methylphenylthio phosphonium hydrogen dibromide... 6. 8 V 26.0 6. 8 25. 8 Hexaethyltriamido 2-methylphenylthio phosphonium hydrogen dibromide 7. 9 30.1 8.6 30. 0 Hexa-n-butyltrianndo 3-methylphenoxy phosphonium hydrogen dibro'mide 6. 2 23. 4 6. 2 24. 5 Hexa-n-propyltriamido 3-methylphenoxy phosphonium hydrogen dibromido 7. 0 26. 7 7. 2 27. 0 Hexaethyltnamido 3-methylphenoxy phosphonium hydrogen dibromjde 8. 2 31.0 8. 6 32. 3 Hexa-n-butyltriarnido 4-methylphenylthio phosphonium hydrogen dibromido... 6. 0 22.8 5. 9 22. 8 Hexa-n-propyltriamido 4-methylphenylthio phosphonium hydrogen dibrornide 6. 8 26. 0 6. 8 25.6 Hexaethyltriamido 4-methylphenylthio phosphonium hydrogen dibromide 7. 9 30. 1 7. 8 29. 5 Hexadn-butyltriamido 2,4-diehloro6-methylphenoxy phosphonium hydrogen dibro- 5.6 5; 31. 5. 3 5. 5

1111 e. e fiexan-propyltriamido 2,4-dichloro-5-methylphenoxy phosphonium hydrogen dibro- 6. 3 6.0 6. 1 6. 0

1111 e. 52 Hexaethyltriamido 2,4-dichloro-5-methylphenoxy phosphonium hydrogen dibromide... 7. 2 6. 9 6. 6 6. 9 53 Hexa-n-propyltriamido 2-chlorophenoxy phosphonium hydrogen dibromide 5. 7 4. 3 5. 4 4. 3 54 Hexaethyltriamido 2-ohlorophenoxy phosphonium hydrogen dibromide I. 5 5. 6 7. 4 5. 2 55. Hexa-n-butyltrlamido SA-dlmethylphenoxy phosphonium hydrogen dibromide 6.0 22.9 6.0 22. 1 56. Hexan-propyltriamido 3,4-dimethylphenoxy phosphonium hydrogen dibromida. 6. 9 26. l 6. 5 26. 9 57 Hexa-n-butyltriarnido 4-brornophenylth1o phosphonium hydrogen dibromide... 5. 5 31. 4 5. 3 33. 0 58. Hexern-propyltriarnido 4-bromophenylthio phosphonium hydrogen dibromide 6. 3 35.8 6. 1 35. 8 59 Hexaethyltriamido ebromophenylthio phosphonium hydrogen dibromide 7.1 40. 2 6.5 42. 0 60 Heirean-butyltriamido 2,4-diehloro-G-methylphenoxy phosphonium hydrogen dibro- 5.6 5.3 5.9 5.9

nn e. 61 Hexan-propyltrlamido 2,4-dichloro-6-methylphenoxy phosphonium hydrogen dibro- 6 3 6.0 6 0 6.2

nu e. 62 Hexaethyltriamido 2,4-dichloro-6-methylphenoxy phosphonium hydrogen dibromide 7. 2 6. 9 o. 0 7. 1

1 Halogen analysis expressed as percent for one type of halogen present or in meqJgram for more than one type of halogen present. The compounds of this invention exhibit good herbi: 35 cal and morphological responses to the treatment. After cidal activity, particularly a post-emergence application. They are especially useful in the control of broadleaved weeds..For suchuse these compounds may be used in a solid, dust type formulation by dispersing them on a finely divided solid. An alternate way of utilizing these compounds is in a liquid formulation in which the active ingredient is employed as a constituent of a solvent solution. Such solutions may also contain dispersing, emulsifying or wetting agents, as well as other active or inert ingredients. Thus, in summary the herbicidal composition of this invention comprises a herbicidal amount of one or more of the above described compounds intimately admixed with a biologically inert carrier. The carrier may be a liquid diluent such as benzene or acetone or a solid. The solid may be in the form of dust, powder or granules. The composition may also contain other pesticides, stabilizers, conditioners, fillers and the like.

The amount of phosphonium compound administered will vary with the particular plant part or plant growth medium which is to be contacted, the general location of application, i.e. sheltered areas such as greenhouses as compared to exposed areas such as fields, as well as the desired type of control. For post emergent application, such as foliar spray application, compositions containing about 0.5 to 8 lbs. phosphonium compound per 100 gal. spray may be used. The application is equivalent to 0.5 to lbs. phosphonium compound per acre.

Post-emergence test.An acetone solution of the test phosphonium compound was prepared by mixing 750 mg. of phosphonium compound, 220 mg. of a nonionic surfactant and ml. of acetone. This solution Was added to approximately 125 ml. of water containing 156 mg. of surfactant. The concentration of the phosphonium compound in this formula was 500 ppm. This formulation was uniformly sprayed on 2 replicate pots of 24-dayold Plants (approximately 15 to 25 plants per pot) at a dose of 100- mmper .cm. After the plants had dried, they were placed in a greenhouse and then watered intermittently at their bases as needed. The plants were observed periodically for phytotoxic effects and physiologi- 3 weeks the herbicidal effectiveness of the phosphonium compound was rated based on these observations. A 0 to scale was used; 0 representing no phytotoxicity, 100 representing complete kill.

L113 .1.(9 2tinued) s C po nd- (example Lambsquarter Crabgrass (Digitaria sangui'nalzs): Mustard (Brit'ssica arvcnsis): Pi'gweed (Atn'aranthus retrafleans); Laznhsquarterfcltenopedium album).

hibited fungicidal activity. In particula r those compounds wherein R R5, R R R and R5 individually contain at least 3 carbon atoms have excellent fungicidal activity.

'When used as fungicides the phosphonium compounds of this invention will be formulated and applied in fungicidal amounts by conventional art methods to fungi or hosts which are subject to fungus attack, especially vegetative hosts such as plants, plant seeds, etc. The amount used will, of course, depend upon several factors such as the host, the type of fungus, the particular phosphonium compound, etc. The phosphonium compounds, maybe combined with inert liquids or solid carriers as powders, solutions, dispersions, etc. for such use.

The phosphonium compounds of this invention will generally be admixed with biologically inert liquids or solids in an amount of from about 0.005 to 95 weight percent. Higher or lower amounts can be used to advantage. Preferablyfrom 1 to 50 weight percent of the com position will be the phosphonium compound. Typical of the liquid carrier which may be admixed with the phosphonium compounds of this invention include, in addition to acetone, such liquids as benzene, Xylene, alcohols, alkylated naphthylene and glycols. Typical solids. which may be incorporated with the phosphonium compounds include the natural clays, such as kaolin clays, diatomaceous earth, synthetic fine silica, talc, pyrophyllite, etc.

Fungicidal formulations may also contain stabilizers, spreading agents, sticking agents, fillers, other compatible pesticides and the like.

To exhibit thefungicidal activity of the compounds of the present invention, the following test was made. 1

Example A number of the inventivecompounds were evaluated for fungicidal effectiveness by means of the mycelial drop test. This test is designed to measure the fungitoxic activity of fungicidal chemicals in terms of their degree of inhibition on mycelium growth. Each compound to be tested was dissolved in acetone at p.p.m. concentration. Paper discs previously inoculated with equal amounts of particular fungus jmycelium were placed on potato dextrose agar medium; The paper discs were treated by applying a precise andequal volume ofeach of these fungicidal solutions to the center. Following treatment with the fungitoxic chemical, the" discs were incubated along with inoculatedbut untreated=control discs at ambient temperatures until such time that these untreated control discs were filled to a'certain level with mycelial growth away from the ;edge of the disc in treated and untreated samples. Frorn'this comparison a percent inhibition of growth area was determined. The results of these tests for various compounds of this invention on the particular fungus mycelium are indicated in Table III.

V r. H ,7 I coff- Many of the compoundsbfjthei present invention ex-n I t .,.TABLE.III

Monilinla Alternaria Exaainple number:

N oTE.-Monilinia (Monolinia fructi cola); Alternaria (Altemoria solaai) In addition to herbicidal and fungicidal activity, many of the compounds of this invention also have excellent 'd efoliating properties. Thus, when cotton, ready for har- Y vesting, is treated with a solution having from 500 to 5000 p.p.m. of'these compounds, the leaves dry up and 'fall from the plant. Then the cotton bolls may be easily harvested. Examination of the boll shows no staining or'other effect from the defoliating composition. The compounds preferred for this use are those in which R R R3, R R and R are n-propyl, Y is O or S, Z is an anion containing bromine or chlorine, and R is phenyl, substituted with O to 5 methyl groups. The most preferred compounds are heXa-n-propyltriamido Z-methyl phenylthio phosphonium hydrogen dibromide and heXa-n-propyltriamido 3-methylphenoxy phosphonium hydrogen dibromide.

As will be evident to those skilled in the art, various modifications on this invention can be made or followed, invthe light of the foregoing disclosure and discussion, without departing-from the spirit or scope of the disclosure or from the scope of the following claims.

, -.I claim: s

- 1. Compounds of the formula v wherein R R R R R and R are individually alkyl of l to 6 carbon atom, Yis oxygen or sulfur, R is phenyl substituted with O. to 5 groups selected from fluorine, chlorine, bromine, alkyl of l to-4 carbon'atoms, alkoxy of l to 4 carbon atoms or nitro, with the proviso that only two different; groups are substituted on R, and Z is a hydrogen dih-alide-anion. 1 2, The compound-of claim-'1 wherein R R R R ,'R and R are the same.

3. The compound of claim 2 wherein R R R R R and R are the same.

4. The compound of claim 3 wherein R R R R R and R are n-propyl or ,n-butyl.

5. The compound of claim 1 wherein R is phenyl substituted with 0 to 5 alkyl or 1 to 4 carbon atoms.

6. The compound of claim 1 wherein R is phenyl substituted with 0 to 5 fluorine, chlorine orbromine atoms.

7. The compound of claim 1 wherein Z is hydrogen dichloride or dibromide anion.

8. The compound of claim 1 being hexa-n-propyltriamido Z-methylphenylthio phosphonium hydrogen dibromide.

9. The compound of claim 1 being hexa-n-propyltriamido 3-methylphenoxy phosphonium hydrogen dibromide.

10. The compound of claim 1 wherein R is phenyl substituted with to fluorine, chlorine, bromine or alkyl groups, 0 to 5 alkoxy groups or 0 to 5 nitro groups.

11. The compound of claim 1 wherein Y is oxygen.

12. The method of preparing compounds of the formula wherein R R R R R and R are individually alkyl of 1 to 6 carbon atoms, Y is oxygen or sulfur, R is phenyl substituted with 0 to 5 groups selected from fluorine, chlorine, bromine, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms or nitro, with the proviso that only two difierent groups are substituted on R, and Z is a hydrogen dihalide anion, by reacting a triamido halophosphonium halide of the formula wherein R R R R R and R have the same meaning as described above and X represents a halogen of atomic number 17 to 53, with a phenol or thiophenol of the formula wherein R and Y have the same meaning as described above at temperatures in the range of from C. to the reflux temperature of the reaction mixture and in the presence of an inert solvent.

13. The process of claim 12 wherein R R R R R and R are n-alkyl of 1 to 4 carbon atoms.

14. The process of claim 13 wherein R is phenyl substituted with 0 to 5 alkyl of 1 to 4 carbon atoms.

15. The process of claim 13 wherein R is phenyl substituted with 0 to 5 fluorine, chlorine or bromine atoms.

16. The process of claim 13 wherein R R R R R and R are the same.

17. The process of claim 16 wherein R R R R R and R are n-propyl or n-butyl.

18. The process of claim 14 wherein the reaction is carried out under anhydrous conditions.

19. The process of claim 12 wherein Z is hydrogen dibromide or hydrogen dichloride anion.

References Cited UNITED STATES PATENTS 3,074,993 1/ 1963 Tolkmith 260-959 X LEWIS GOTTS, Primary Examiner A. H. SUTTO, Assistant Examiner US. Cl. X.R.

' UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3 ,755,5l0 Dated Auqust 28 1973 I DAVID CHEONG KING CHAN It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Col 8 lines 66-67, Claim 2 should read --The compound of Claim 1 wherein R R R Ru, R and R are individually n-alkyl of l to car on atoms.--

Signed and sealed this 20th day of May 1975.

(SEAL) Attest:

C. MARSHALL DANN RUTH C. MASON Commissioner of Patents Attesting Officer and Trademarks UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,755,510 August 2 1973 Inventor) DAVID CHEONG'KING CHAN I It is certified that error appears in the above-Identified patent and that said Letters Patent ate hereby corrected as shown below:

Col. 6, Example 29, last column, "10.4" should read --l0.6-. 1

Col. 6, Example 30, last column, "22.6" should read --22.4-. I

C01. 8, line 31, "solaai" should read --solani-.

Col. 10, line 19, Claim 18 should be dependent on Claim 12.

Signed and sealed this 17th day of September 197 (SEAL) Attest: I I

MCCOY M. GIBSON," JR. C. MARSHALL DANN Attesting Officer COmmlSSlOneI of Patents 

